"clipka" <nomail@nomail> wrote in message 
news:web.49aa9eec2533534f2ddf2a340@news.povray.org...
>
> you can use a pigment variable in a
> pigment function, allowing you to retrieve the color at a given point...]
>

In fact I think that's how the eval_pigment macro works. If you have a lot 
of points that you need to check it's probably more efficient to define your 
own function once, because calling eval_pigment would redefine the function 
each time.

Regards,
Chris B.

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